Scalable and reconfigurable optical tapped-delay-line for multichannel equalization and correlation using nonlinear wave mixing and a Kerr frequency comb

Ari N. Willner, Peicheng Liao, Kaiheng Zou, Yinwen Cao, Arne Kordts, Maxim Karpov, Martin H.P. Pfeiffer, Ahmed Almaiman, Ahmad Fallahpour, Fatemeh Alishahi, Karapet Manukyan, Moshe Tur, Tobias J. Kippenberg, Alan E. Willner

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We experimentally demonstrate a scalable and reconfigurable optical tapped-delay-line (TDL) for multichannel equalization and correlation of 20-Gbaud quadrature-phase-shift-keyed (QPSK) signals using nonlinear wave mixing and a microresonator Kerr frequency comb. The optical TDL mainly consists of two stages: one being a multicasting of the original signals in a periodically poled lithium niobate (PPLN) waveguide with Kerr comb lines functioning as mutually coherent pumps, while the other is a coherent multiplexing of the delayed and weighted signal replicas in a second PPLN. A two- or three-tap optical TDL is demonstrated to simultaneously equalize a distorted QPSK data signal, reducing the error vector magnitude (EVM) from 22.5% to either 19.9% or 18.2%, and search two- or three-symbol patterns on another QPSK signal.

Original languageEnglish
Pages (from-to)5563-5566
Number of pages4
JournalOptics Letters
Volume43
Issue number22
DOIs
StatePublished - 15 Nov 2018

Funding

FundersFunder number
National Science FoundationY501119
Office of Naval ResearchN00014-16-1-2813
Air Force Office of Scientific ResearchFA9550-15-1-0166
Office of the Assistant Secretary for Research and Technology

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